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Chromium-containing waste water treatment system adopting double anion exchange columns and treatment method of system

An anion exchange column, cation exchange column technology, applied in ion exchange water/sewage treatment, metallurgical wastewater treatment, water/sewage treatment and other directions, can solve the complex resin regeneration and maintenance operations, not suitable for large-scale wastewater treatment, cannot Effectively recover hexavalent chromium and other problems to achieve the effect of prolonging service life, improving affinity and improving recovery efficiency

Active Publication Date: 2017-04-26
无锡出新环保设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the problems that the existing chromium-containing wastewater treatment methods cannot effectively recover hexavalent chromium, and the resin regeneration and maintenance operations in the existing ion exchange treatment methods are complicated, and are not suitable for large-scale wastewater treatment, the present invention provides a method using dianions Exchange column chromium-containing wastewater treatment system and treatment method

Method used

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  • Chromium-containing waste water treatment system adopting double anion exchange columns and treatment method of system
  • Chromium-containing waste water treatment system adopting double anion exchange columns and treatment method of system
  • Chromium-containing waste water treatment system adopting double anion exchange columns and treatment method of system

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Embodiment 1

[0112] This embodiment provides a chromium-containing wastewater treatment system, the system includes a filter device 1, a cation exchange column 2, a first anion exchange column 3, a second anion exchange column 4 and a sodium removal column 5, wherein the filter device 1 , cation exchange column 2, the solution inlet and outlet of the first anion exchange column 3 and the second anion exchange column 4 are connected successively, the saturated liquid outlet of the first anion exchange column 3 and the second anion exchange column 4 are connected with the liquid of the desodium column 5 The entrance is connected.

[0113] The liquid inlets of the cation exchange column 2 , the first anion exchange column 3 , the second anion exchange column 4 and the sodium removal column 5 are respectively provided with regenerant dosing devices 6 .

[0114] Wherein, the resin filled in the cation-exchange column 2 is H-type 001×7 styrene-based cation-exchange resin; the resins filled in th...

Embodiment 2

[0116] This embodiment provides a chromium-containing wastewater treatment system, the system except polyvinylamidine and sulfonated polyarylethersulfone composition adhesion amount is 20mg / m 2 , except that the mass ratio of polyvinyl amidine to sulfonated polyarylether sulfone is 3:1, other structures are the same as in Example 1.

Embodiment 3

[0118] This embodiment provides a chromium-containing waste water treatment system, except that the adhesion amount of the polyvinylamidine and sulfonated polyarylethersulfone compositions in the system is 30mg / m 2 , except that the mass ratio of polyvinyl amidine to sulfonated polyarylether sulfone is 7:1, other structures are the same as in Example 1.

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Abstract

The invention provides a chromium-containing waste water treatment system adopting double anion exchange columns and a treatment method of the system. The system comprises a filtering device, a cation exchange column, a first anion exchange column, a second anion exchange column and a sodium removing column, wherein, solution inlets and outlets of the filtering device, the cation exchange column, the first anion exchange column and the second anion exchange column are sequentially connected; and saturated liquid outlets of the first anion exchange column and the second anion exchange column are connected with a liquid inlet of the sodium removing column. According to the system, by means of the difference of the adsorbing appetency of resin on different ions and the selective adsorptivity of the resin, the purpose of removing, separating and recycling chromic acid is achieved. Meanwhile, by performing the coating treatment on ion exchange resin, the appetency of the ion exchange resin on corresponding ions is further improved, and therefore the recycling efficiency of hexavalent chromium is improved, and the service life of the ion exchange resin is prolonged.

Description

technical field [0001] The invention relates to the field of electroplating wastewater treatment, and relates to a chromium-containing wastewater treatment system and a treatment method thereof, in particular to a chromium-containing wastewater treatment system using a double anion exchange column and a treatment method thereof. Background technique [0002] Cr(Ⅵ) is a carcinogenic, teratogenic and mutagenic highly toxic substance, 100 times more toxic than Cr(Ⅲ), and is listed as a class I controlled pollutant by the state. Cr(Ⅵ) in the waste water with the difference of pH value respectively as CrO 3 , CrO 4 2- and Cr 2 o 7 2- Due to the high content of harmful substances and complex components, the processing technology is difficult and poses a serious threat to the surrounding environment. [0003] In the chromium-containing wastewater discharged from the chrome plating workshop, there was a highly toxic substance CrO 4 2- or Cr 2 o 7 2- In addition, it also c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01G37/033C02F103/16C02F101/22C02F101/20
CPCC01G37/033C02F1/001C02F1/42C02F1/66C02F9/00C02F2001/422C02F2001/425C02F2101/203C02F2101/22C02F2103/16
Inventor 吴义震
Owner 无锡出新环保设备有限公司
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